Chalk River, Ontario Weather
Chalk River, Ontario — live current conditions, hourly and 7-day forecasts, ECCC alerts, aviation weather, radar and satellite imagery, marine and fishing conditions with a solunar forecast, soil and crop conditions for Chalk River in Renfrew.
Marine forecast and fishing conditions near Chalk River.
Flight conditions near Chalk River. Data source: locating…
Soil conditions, frost risk and crop weather for Chalk River.
About Chalk River, Ontario
Chalk River is a community in Renfrew, Ontario, Canada. It is classified as a town. Chalk River is located at 46.0180°N, 77.4530°W. It observes Eastern Time (UTC−5 / −4). Postal code area: K8H.
Chalk River rests upon the quiet shore of Lower Allumette Lake, where the land rises toward the steady, granite-shouldered presence of Clement Hill. It lies 4.5 km south-west of Deep River, ON (from Deep River, ON: bearing 217°T), and is situated 11.4 km north-west of Stewart Crossing. The air here carries a sharp, pine-scented clarity, especially at dusk when the light thins into a bruised violet and settles against the stillness of the water. Beyond the immediate rise of the hills, the terrain holds a rugged, resilient character, shaped by the ancient weight of the Canadian Shield. The Ottawa River flows with a deep, hidden momentum just seven kilometres away, while the wilder, undisturbed reach of the Réserve écologique du Ruisseau-de-l'Indien waits only twelve kilometres distant, offering a sanctuary of spruce and shadow. Life in Chalk River moves with a deliberate intensity, anchored by a history of scientific curiosity and a reliance on the surrounding woods. While the local economy is defined by a long-standing commitment to research and technical industry, the daily experience remains rooted in the cycles of the seasons and the demands of the northern climate. People here navigate the winters with a quiet pragmatism, finding warmth in the small, persistent habits of a village that knows its place within the vast, forested landscape. Even as modern work occupies the day, there is a lingering recognition of the land’s original character, a sense that Chalk River persists in a delicate balance between the precision of its laboratories and the untamed expanse of the nearby wilderness.
Live animated radar for Chalk River and surroundings — RainViewer.
NOAA GOES-19 GEOCOLOR — Canada / Northern U.S. sector. Auto-refreshes every 10 minutes on page reload. Frames the whole country from Newfoundland to the BC coast, plus adjacent Pacific and Atlantic storm approaches.
Source: NOAA/NESDIS GOES-19 · Public domain · Sector code can (Canada / Northern U.S.) · Auto-updates on page reload
| Location | Chalk River, Renfrew, Ontario |
| Coordinates | 46.01804°N, 77.45295°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | K8H |
| Area Code | 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905 |
| Page generated | July 2026 |
| Weather data | Open-Meteo (open-source), Environment and Climate Change Canada |
About This Chalk River, Ontario Weather Page
This page provides live weather conditions and forecasts for Chalk River, Ontario, including current conditions, a 24-hour hourly forecast, 7-day outlook, ECCC extended text forecast, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modelled estimate shown when no station is in range), precipitation radar and NOAA GOES satellite imagery. Additional sections may include marine and fishing conditions with a solunar forecast for coastal localities, and soil temperature, crop weather and live Water Survey of Canada river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for Chalk River includes coordinates 46.018040°N, 77.452950°W, situated in Renfrew. Postal FSA: K8H. Telephone area code: 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905. Timezone: Eastern Time (UTC−5 / −4).
Weather data is sourced from Environment and Climate Change Canada (ECCC) and the open-source Open-Meteo API. Aviation data is sourced from aviationweather.gov, with a modelled estimate used where no nearby reporting station is available. River and stream data is sourced from Water Survey of Canada (WSC) via the ECCC GeoMet realtime hydrometric feed. Marine and solunar data are modelled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-19 and is public domain.